Unregistering can be done via TUCaN until eight days before the examination takes place without giving reasons. Afterwards unregistering is only possible if you can provide some evidence for health reasons or similar serious reasons. This has to be done in written form via the Examination Office. There are some changes regarding the doctor's notes since the introduction of the new general implementation terms of the TU Darmstadt in the winter term 2012/13. Informations about the changes can be found on the homepage of the Examination Office.